Bottgers,
Ever since I saw the virgin oil analysis, I have not liked what I saw when it came to maxlife. At that time, it did have moly listed in the analysis, BUT, the detergent levels was not that impressive, thus leaving it wide open to oxidation levels increasing faster than some of the others.
After doing my little experiment, it also showed that the detergents was not that good in comparison to Penzoils High mileage motor oil or any of the synth/blends. Now with high mileage motors you may not want to actually clean the seals and such as it would create more leaks.
So in my opinion, the maxlife, and maybe even some of the other high mileage motors are designed to be run only 3000 miles.